Axial Piston Compressor

Abstract

Axial piston compressor, especially for motor vehicle air-conditioning systems, having a tilt plate ( 2 ), especially a ring-shaped tilt plate, which is variable in terms of its inclination with respect to a drive shaft ( 1 ) and which is driven in rotation by the drive shaft ( 1 ) and is in articulated connection with at least one supporting element ( 6 ) arranged at a spacing from the drive shaft ( 1 ) and rotating together therewith, the pistons in each case having an articulated arrangement with which the tilt plate ( 2 ) is in sliding engagement, and the supporting element ( 6 ) being arranged at the radially outer end of a force transmission element ( 7 ) which rotates together with the drive shaft ( 1 ) and is fixed in the latter so as to be non-displaceable in the radial direction, wherein the force transmission element ( 7 ) is mounted in the drive shaft ( 1 ) so that it can rotate about its longitudinal axis.

1 . Axial piston compressor, especially for motor vehicle air-conditioning systems, having a tilt plate ( 2 ), especially a ring-shaped tilt plate, which is variable in terms of its inclination with respect to a drive shaft ( 1 ) and which is driven in rotation by the drive shaft ( 1 ) and is in articulated connection with at least one supporting element ( 6 ) arranged at a spacing from the drive shaft ( 1 ) and rotating together therewith, the pistons in each case having an articulated arrangement with which the tilt plate ( 2 ) is in sliding engagement, and the supporting element ( 6 ) being arranged at the radially outer end of a force transmission element ( 7 ) which rotates together with the drive shaft ( 1 ) and is fixed in the latter so as to be non-displaceable in the radial direction, characterised in that
 the force transmission element ( 7 ) is mounted in the drive shaft ( 1 ) so that it can rotate about its longitudinal axis.   
   
   
       2 . Compressor according to  claim 1 , characterised in that
 the supporting element ( 6 ) and force transmission element ( 7 ) serve substantially only for providing axial support for the pistons or support for the gas force, whereas an arrangement independent thereof, especially an articulated connection between the drive shaft ( 1 ) and the tilt plate ( 2 ), serves substantially only for torque transmission.   
   
   
       3 . Compressor according to  claim 1 , characterised in that
 the supporting element ( 6 ) has a basic shape which in radial section is approximately rectangular, the corners being highly rounded especially with different radii, or compressed or circular or in the shape of a deformed circle or ellipsoidal.   
   
   
       4 . Compressor according to  claim 3 , characterised in that
 those regions of the supporting element ( 6 ) which are in contact with the tilt plate ( 2 ) are of at least partly cylindrical or barrel-shaped construction.   
   
   
       5 . Compressor according to  claim 1 , wherein the tilt plate ( 2 ) is pivotally mounted on a sliding sleeve ( 3 ) mounted so as to be axially displaceable along the drive shaft ( 1 ), characterised in that
 between the sliding sleeve ( 3 ) and the tilt plate ( 2 ) there is provided an arrangement, especially at least one cylindrical-pin-like element or supporting or contact surfaces, in order to provide support for a torsional moment acting in the region of the drive shaft ( 1 ).   
   
   
       6 . Compressor according to  claim 1 , characterised in that
 the force transmission element ( 7 ) comprises, at least over parts of its periphery, a shoulder ( 13 ) in the region of the drive shaft ( 1 ) and/or, at its end remote from the supporting element ( 6 ), a securing element ( 8 ), especially extending in the axial direction.   
   
   
       7 . Compressor according to  claim 5 , characterised in that
 the tilt plate ( 2 ) is connected by way of drive pins ( 9 ) to the sliding sleeve ( 3 ) and/or to the drive shaft ( 1 ).   
   
   
       8 . Compressor according to  claim 7 , characterised in that
 the drive pins ( 9 ) are introduced into the sliding sleeve ( 3 ) or the tilt plate ( 2 ) with a press fit.   
   
   
       9 . Compressor according to  claim 8 , characterised in that
 the drive pins ( 9 ) project into a recess ( 22 ), especially a groove ( 14 ), in the drive shaft ( 1 ).   
   
   
       10 . Compressor according to  claim 5 , characterised in that
 a connecting element, especially a feather key, is arranged between the drive shaft ( 1 ) and the sliding sleeve ( 3 ), which connecting element allows transmission of forces and moments in a radial direction and is mounted in axially displaceable manner on the drive shaft ( 1 ).   
   
   
       11 . Compressor according to  claim 10 , characterised in that
 that end of the force transmission element ( 7 ) which is remote from the supporting element ( 6 ) projects through the drive shaft ( 1 ) and into a longitudinal slot ( 17 ) in the sliding sleeve ( 3 ) in such a way that drive torque is transmitted from the drive shaft ( 1 ) to the sliding sleeve ( 3 ) by means of that end of the force transmission element ( 7 ) which is remote from the supporting element ( 6 ).   
   
   
       12 . Compressor according to  claim 1 , characterised in that
 the supporting element ( 6 ) is so constructed that it is located within a recess ( 22 ) in the tilt plate ( 2 ) in line contact with the latter.   
   
   
       13 . Compressor according to  claim 12 , characterised in that
 the height (S 1 ) of a/the recess ( 22 ) in the tilt plate ( 2 ) is equal to the sum of the radii of curvature of a radially outer (R 1 ) and radially inner (R 2 ) contour.   
   
   
       14 . Compressor according to  claim 13 , characterised in that,
 on that side of the tilt plate ( 2 ) which faces the pistons, the wall thickness (S 2 ) in the region of the/a recess ( 22 ) in the tilt plate ( 2 ) is greater than on that side which is remote from the pistons (S 2 >S 3 ), whilst at the same time the clearance volume is constant for all tilt angles of the tilt plate ( 2 ).   
   
   
       15 . Compressor according to  claim 10 , characterised in that
 the drive shaft ( 1 ) and the sliding sleeve ( 3 ) have flattened regions ( 11 ) that correspond to one another, so that the sliding sleeve ( 3 ) is mounted on the drive shaft ( 1 ) in a manner ensuring conjoint rotation.   
   
   
       16 . Compressor according to  claim 15 , characterised in that
 the tilt plate ( 2 ) has at least one flattened region ( 12 ) which corresponds to a flattened region ( 11 ) on the sliding sleeve ( 3 ).